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<head>
    <title>three.js webgl - OBJLoader + MTLLoader</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <style>
        body {
            font-family: Monospace;
            background-color: #000;
            color: #fff;
            margin: 0px;
            overflow: hidden;
        }
        #info {
            color: #fff;
            position: absolute;
            top: 10px;
            width: 100%;
            text-align: center;
            z-index: 100;
            display:block;
        }
        #info a, .button { color: #f00; font-weight: bold; text-decoration: underline; cursor: pointer }
    </style>
</head>

<body>
<div id="info">
    <a href="http://threejs.org" target="_blank">three.js</a> - OBJLoader + MTLLoader
</div>

<script src="js/three.min.js"></script>

<script src="js/loaders/DDSLoader.js"></script>
<script src="js/loaders/MTLLoader.js"></script>
<script src="js/loaders/OBJLoader.js"></script>

<script src="js/Detector.js"></script>
<script src="js/stats.min.js"></script>

<script>
    var container, stats;
    var camera, scene, renderer;
    var mouseX = 0, mouseY = 0;
    var windowHalfX = window.innerWidth / 2;
    var windowHalfY = window.innerHeight / 2;
    init();
    animate();
    function init() {
        container = document.createElement( 'div' );
        document.body.appendChild( container );
        camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
        camera.position.z = 250;
        // scene
        scene = new THREE.Scene();
        var ambient = new THREE.AmbientLight( 0x444444 );
        scene.add( ambient );
        var directionalLight = new THREE.DirectionalLight( 0xffeedd );
        directionalLight.position.set( 0, 0, 1 ).normalize();
        scene.add( directionalLight );
        // model
        var onProgress = function ( xhr ) {
            if ( xhr.lengthComputable ) {
                var percentComplete = xhr.loaded / xhr.total * 100;
                console.log( Math.round(percentComplete, 2) + '% downloaded' );
            }
        };
        var onError = function ( xhr ) { };
        THREE.Loader.Handlers.add( /\.dds$/i, new THREE.DDSLoader() );
        var mtlLoader = new THREE.MTLLoader();
        mtlLoader.setPath( 'others/grass/' );
        mtlLoader.load( 'Grass_01.mtl', function( materials ) {
            materials.preload();
            var objLoader = new THREE.OBJLoader();
            objLoader.setMaterials( materials );
            objLoader.setPath( 'others/grass/' );
            objLoader.load( 'Grass_01.obj', function ( object ) {
                object.position.y = - 20;
                scene.add( object );
            }, onProgress, onError );
        });
        //
        renderer = new THREE.WebGLRenderer();
        renderer.setPixelRatio( window.devicePixelRatio );
        renderer.setSize( window.innerWidth, window.innerHeight );
        container.appendChild( renderer.domElement );
        document.addEventListener( 'mousemove', onDocumentMouseMove, false );
        //
        window.addEventListener( 'resize', onWindowResize, false );
    }
    function onWindowResize() {
        windowHalfX = window.innerWidth / 2;
        windowHalfY = window.innerHeight / 2;
        camera.aspect = window.innerWidth / window.innerHeight;
        camera.updateProjectionMatrix();
        renderer.setSize( window.innerWidth, window.innerHeight );
    }
    function onDocumentMouseMove( event ) {
        mouseX = ( event.clientX - windowHalfX ) / 2;
        mouseY = ( event.clientY - windowHalfY ) / 2;
    }
    //
    function animate() {
        requestAnimationFrame( animate );
        render();
    }
    function render() {
        camera.position.x += ( mouseX - camera.position.x ) * .05;
        camera.position.y += ( - mouseY - camera.position.y ) * .05;
        camera.lookAt( scene.position );
        renderer.render( scene, camera );
    }
</script>

</body>
</html>
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